The proposed project consists of removal of the Monsignor William J. Casey Overpass in the Jamaica Plain neighborhood of Boston and the construction of new at-grade roadways in its place. The project also includes geometric and signal improvements at a number of substandard area intersections (i.e., South Street/Arborway, Washington Street Hyde Park Avenue, and Shea Circle), modifications to the upper busway at Forest Hills Station, various operational and infrastructure improvements associated with multi-modal transit at Forest Hills Station, expanded pedestrian and bicycle accommodations, and creation of additional open space.